goodstein



W. L. GOODSTEIN BUFFING DEVICE July 9, 1929 Re. 17,366

Original Filed Jui 51, 1926 INVENTOR.

A TTORNEY Reissued July 9, 1929.

UNlTED STATES PATENT OFFICE.

WILLIAM L. GOODSTEIN, OF NEW YORK, N. Y.

BUFFING DEVICE.

Original No. 1,645,047, dated October 11, 1927, Serial No. 126,109, filed July 31, 1926. Application for reissue filed March 16, 1929.

This invention relates to polishing or bufj ting devices and more particularly to those of the highest grade, adapted for manipulatlon on flat surfaces as (hrected and controlled by an operator, with special reference to the bodies of vehicles.

. finely finished surface in removing undesirable accretions. \Vith this devieea vehicle of any size can be cleaned and polished in a small fraction of the time required for the manual performance of the same work.

Not only is there great danger of abrading the surface but also'of causing discolorations due to heat engendered by friction of the polishing means employed.

The cellulose or pyro'xylin lacquer finishes now almost universally used on automobile bodies are particularly susceptible to becoming discolored and blistered by the heat engendered by the friction of polishing pads, so much so, in fact, that in spite ofthe exercise of the greatest care the polishing of this type of finish with the pads heretofore known often results in discoloration or blistering of the finish by the frictional heat engendered by the rubbing of the pad on the surface, and has precluded the employment of power rotation for these pads on such [inishes, due to the damaging frictional heatdriven pads are operated.

Polishing pads for high, glossy finishes of oil paint or pyroxylin lacquer have necessarily been made of material, such as wool felt or lambs wool,-which will not scratch or wear into the finish. However, such material has a serious defect when used to polish pyroxylin lacquer finishes in that the materials used for polishing are very poor conductors of heat and therefore quickly engender and hold suflicdent frictional heat in use to cause discoloration or blistering of the pyroxylin finish.

mg caused by the speed at which power Serial No. 347,710.

the application of successive coats and withany suitable abrasive either in paste or liquid form.

Another advantage resides in the interposition between the buffing element audits backing of a soft resilient cushion adapted to evenly distribute the pressure applied in a uniform even manner.

These and other practical and valuable features, which will become obvious as-the description progresses, are accomplished by the novel selection, construction and arrangeinentof parts as hereinafter described and shown in the accompanyingdrawing, form-- ing a material part of this disclosure and in which the figure is a partial side elevational, partial transverse sectional view of a butting head made'in accordance with the invention.

In the drawing the numeral 5 designates the front portion of an arbor or drive spindle, the same being actuated in any convenient manner from a power unit, as a flexible shaft handle, also omitted, by which the implement may be efficiently manoeuvred.

Fixed on the spindle 5 is a collar 6, the inner extending end 7 of the spindle being screw-threaded and provided with a nut 8 and washer 9.

The arbor 7 passes through an axial opening in a circular flexible backing plate 10 which may be metal but preferably in a series of rubber plates interposed with layers of canvas or like reenforcing material to provide a suitable degree of stiffness. i

Adjacent the backing plate .10 is a flexible press board or fiber disc 11, the disc and plate being clamped against the collar 6 by the nut 8 to be driven by the arbor.

Acircular pad 12 of considerable thickness and of larger diameter than the backing 10 is or the like, not shown, and provided with a secured to the disc 11 by a mutually adherent film of glue 13 or like adhesive, this pad being composed of heat absorbent felt, soft,spongy and elastic, constituting a cushion and having an opening 14 into which the nut 8 extends, the opening beingof sufiicient size to permit the entrance of a Wrench in securing th'e'hea'd upon the arbor.

A disc 15, substantially one third the thickness of the pad 12, of pure soft wool felt is secured to the face of pad 12 b a film of adhesive 16, so applied between t ese pads as to avoid projecting to the periphery of the wool pad 15 which, as shown, is of slightly smaller diameter than the cushion pad 12 and held firmly concentric upon its face; the outer pad 15 is provided with a relatively small central opening 17 to admit a wrench into the chamber 14 in adjusting the head upon its arbor.

In operation the face of the pad 15 is applied to the work surface, previously relieved of any collection of caked mud, and such pres sure applied by an operator as discretion and experience indicate.

The rapidly revolving soft face of the pad immediatelyproduces a high glossy polish, reducing the usual time for such Work very materially and obviously scratching is impossible as any hard substance, even the glue, is prevented fromcoming in contact with the work, while thearbor and its parts are entirely enclosed, and any heat generated is absorbed or carried off by the felt.

From the foregoing it will be seen that a simple device for this purpose has been disclosed in the preferred form of its embodi; ment, but it is not desired to restrict the details to the exact construction shown, it being obvious that changes, not involving the exerciseof invention may be made Without conflicting with the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. A polishing head comprising a soft disc fixed on the back of said pad, a laminated backing for such fiber disc, and means to convey rotary motion to said head.

1. A polishing head comprising a power driven arbor, a yielding backing plate secured on said arbor, sald plate comprising rubber and canvas sheets arranged in alternate relation, a cushion pad fixed on the face of said plate, said pad having an opening into which said arbor extends, and a facing'disc of softer texture than said cushion pad fixed on the outer side of said pad, said disc containing an opening through which said arbor is accessible.

In testimony whereof I have hereunto affixed my signature.

WILLIAM 7L. eoo sTEIN. 

